Horizontal rotary type oil burner



Feb. 27, 1945. a, FROST HORIZONTAL ROTARY TYP E OIL BURNER Filed om. 19,1942 Rd 0 a K v 0 m 5 2 w M 6 2 e w MG M 6 4 M F m o W 0 L w J h m Afllq. Y m nlr/ 4 8 9 6 6 Z M 4 v 7 3 6 4 e 5 3 W 2 5 x V I Z A 3 0 m 5 WM 5 3 a w 3 Z 9 (LA 6 MW M 3 I 3% Patented Feb. 27, 1945 t I r 2,370,3457 nonizonmnnomnysr monmonnsn .1mm Frost, seifflef'wash.

Application October 19, 1942,:SeriaI-Noi 4162523 4"Cla7lms. (Cl," 158=My inventionrrelates tor horizontal rotary:oil Morgen scale than Rig;1, and 2a;- smaller-scale than burnerssof the type hswingran' oil'zcupwl'iichis -Fi g.2,vshowing amoil an'd airiintakehousingwmrotated :atzarelatively high speedaand thr u bodiectmithecinvention. *which ithe-.-oi1a,is:i fed: sol that it will: be discharged Referringvto .-Fig.1; I%show a horizontal: rotary on ea thin conical: filmr from "the.open: end "of the l 5 lliypeijoflkbmrnep of glm w f -rtmwhichumy im -Inrn s o this i ype s ar inventiomismpplid. in saidfiFig. 1,aithe;rotarynari1y,provided for:- supplying rlowtpressure blast bbum map \and tsome:art i :the air pply tair and airat atmospheric; pressure moundu-thezzmeans "have zbeenralteredifin accordancerwith myrotatingfiupfifrom'iwhich h is iinvention azndhthefremaiinin'geparwshownirin said "This p ur last air and::atm0Sph ai -10irFig.i1;caresofiwellrlmownfistandardcconstmcfion. furnish oxygen forcombustion-.1 purposes but-will FIhevstandard bumer? pants :shown orRigg. t1, .not atomizeor dinar'y cold fiuel-l oilv'sufiicientiyvtoomprjs ,1[amam g u m ym m rmake it possible; towignite: this coldfuel-oil with g lz gmg :1 l connected witluone end portion ea spark.hForLthisreason itqhas?heretofore been {Emmabmguaw;1gggcomiectecpwitmthepomergend necessary to heat the fue1oi1-or-to use ligas or lg -fio Ajm bwrg f's 'm unted an thenhuusmg"lighter oil (such as Diesel'oil or distillate for start- In dlthagas'sha'ft 31"4 mdnnectedmygbmgdflve l-ing purposes. -m81I1S I-S Wi tha' rotatable 'bumer tube "What is I111 accorden'ce withl'myl'imentwni-IProvide suitably -joumiled in the housing" flmas -by bear- ."means for fdischarging 2. it-hm annular" =blast f n ;Th 1 rwa nportwnififithe.burner relativelyxhigh,pressureeimaround the rotating='%20;- whasgawowry burneprwpusecmd therto g g i i i 5 2 g "This'rotaryburner cup *designated generally-b3; ere y oroug y rea zupran a, omize'is 5: A a 1 2-. discharging film of f-ueloil to (such anzextent-that ismade m accordanc wlth my mventmn and hit canzbeignitedabyaon ordinaryspark Itype elec- W ,fipressureiaif.iszsecuredgtov hebumerlmbefllandtric igniter connected with :anelectricdgnition,jdperatesuwithmwhe,fanihousmgj. wheffan transformer. .7 q r Itis anobjector-my. invention toprovide means gigggg figg? -for;em bodiment .in=2. horizontalmotary ;type oil .u ibutteffiyyvalveinlmayhbegdmwnimtogthe burner which will make it possible2' to ignite lcol'd .iuel mil with an ordinaryxsparb typeigniter -:in:starting the-burner.

lt-zis ra furthersobj ectvofl my invention to-,.:provide high pressureair supply means whichumay be incorporated into the construction of:horizon-tal rotar type oil'burners now .inwcommon -use without'alte-ration of-any of-the standard ,parts of the burner-head:exceptrtherotary-cup. Another object of, my invention. is l to increasethe efliciency and capacity of 4m oil burner :of this type by lprovidingmeans for moreeffieiently ien housing ll "through "an opening 13 andthrough'fa.convergentnozile{tube formed"of two "members "24 "and ""25that "extend "around "the -"'burner'-'cupf8 inspected relationtherefrom.

"A conicakno'zzle" guard 'an'dfprotectorifiiprfere'b'ly "surroundsthenozzle "'2 4-"2'5 in "spaced relation therefrom. Pnlf'e'rably olir at"atmospheric pressure may enter through the no z'zle "guard -26.Preferably a; front. plate"! 1" i secured :40 'tofthegiozzle guard26andb'oth or these p gs I "26"an'd' Tare secured to'the fanhous'ingfl.Y e VZEZIVQLZIlEegTPhE fuel on that 15 being consumed by from mateizrmay? g sf dt g sm 9 Other objects will belapparent from the,follow- 7 t??? P i 5" FPflYFFFWWF ing description taken in connection-.w'it thewacihrquqbi g -Rm q w e firebox when companying drawing andappended claims. UP "{p n gm gf' v to In'theidmwingy finflelectric'igmter 28 1 s. preietablymositioxied "Figurel is e viewpar'tly in sideelevation-and externally mfi'lbfiiand lsfprv'iddwith ise-housing.Blast*a1r"is oischarge'd from' the v.pa'r-tly in section of a'horizontalrotaryrtype fuel Spark l a 'WthQ TIDYOJeCts intothe m1 burner ofstandard'constructiomhaving my --n h qha g A inventioninstalledhinconnectionfltherewlth. he outerrend DOT-$101105 therotatable burner 2 isfla vsiew in longitudinal ctionsono "tu be 16,51.erthelend portionfshowniat thelle'ft I larger. scaleithanhFigl showjn sarotar woil cup in Flig'vl extendsrinto anfiil afid ain'intake housornozzle-modified in accordance with #m -invem -i-ng 0 find s' rota iv ydispo Wit n hu antion. nember'3 L =inv saiq housingl and a peckingwasher 'Fig. '13 his a viewin-vlongitud-inal section sonsa 32 andsscrew;cap=- are P din c n i n with hub member 3| to prevent leakagearoundterior of the burner cup 45.

connected by a conduit 38 with a suitable device 39 for supplying highpressure air. The air pressure supply device 39 is driven by the motorl3.

Preferably air is taken into the high pressure air supply device 39through an air inlet conduit 40. Another conduit 4| having a valve 42 isof the secondary cup 54.

secondary cup 54 and on the end portion of the oil inlet tube 34. Thissleeve 55 fits snugly but rotatively on the oil inlet tube 34 and has aflange 51 that sits'snugly against the bottom of the secondary cup 54.The sleeve 56 thus forms a sealing member that tends to prevent oil fromescaping into the air passageways and air from entering the oil chamberin the secondary cup member 54.

A plug fitting 59 is threaded into the outer end A compression spring 60is interposed between the plug fitting 59 and v flange 51 of sleeve 55to hold the said flange 51 stem 62 upon'which the hub portion 63 of adisc preferably connected with the conduit 40. If

desired gas or heated air or steam or a mixture of two or more of thesame may be admitted through conduit 4|. Obviously this will not beneeded for starting purposes in connection with my invention because oilburners equipped with my invention maybe started with cold oil andordinary atmospheric air. However under. certain operating conditionsgas may be admitted to enrich the fuel mixtureor steam or heated air maybe admitted to better atomize heavy oil.

Fuel oil under pressure is preferably supplied to the oil inlet pipe 34through an opening 43 in the housing 30. The opening 43 is connected bya conduit 44 with any suitable supply of fuel oil under pressure. Onesatisfactory way to supply such fuel oil under pressure is to supply itthrough a pump driven from the motor l3.

The rotary burner cup l8, when constructed in accordance with myinvention,,as shown in Fig. 2, comprises an expanding cup member 45having an inner wall 46 of frustro-conical shape along which fuel oilmay flow until it discharges in a thin film and ina generally radialdirection from the open end of said cup member 45.

The bottom end portion of the burner cup 45 is press fitted into, orotherwise rigidly secured to, the burner tube I6, A'sleeve 41 isprovided with an inwardly directed flange 48 that is press fltted orotherwise rigidly mounted on the exa The internal diameter of the majorportion of the sleeve 41 is larger than the external diameter of the cup45 to provide an annular air passageway 49 between the sleeve 41 and thecup 45. The, sleeve 41 has a convergent annular tip 50 that terminatessubstantially flush with the forward end portion of the rotary cup 45and that is of a suitable size and suitably positioned to form a narrowannular air discharge opening 5| through which a An annular externalgroove 52 is preferably provided on the burner cup 45 just forwardly ofthe flange 4B and a plurality of oblique openlugs 53 extend from thisgroove 52 inwardly and provide'air passageways between the burner tube 6and the annular air conduit 49.

A secondary cup 54 is disposed within the burner'cup 45 and has a hubportion 55 that is threaded into the bottom portion of said cup 45.

The oil inlet tube 34, which does not rotate, en-

ters through the hub portion of the secondary 64 isslidably mounted. Acompression spring 65 is interposed between the disc 64 and a nut 66 onthe stem62 and tends-to yieldingly hold the peripheral portion of' thedisc against the conical inner wall 46 of the burner cup 45. Oil underpressure within the rotating cup 45 must escape past the periphery ofthe disc 64 before it can discharge from the rotating cup. The disc 64will thus act as an oil retarding member and as a deflector to insurethat all of the oil follows along the wall 45 of the rotating cup.

In the operation of this device the fuel oil will flow in a thin filmalong the wall 45 of the rapidly rotating cup 45 and will discharge in athin film like cone and in a generally radial direction from the end ofthe rapidly rotating cup 45. At the same time a cylindrical knife likesheet of high pressure air will discharge from the opening 5| across thepath of the discharging film of fuel oil and will thoroughly atomizesaid fuel oil to such an extent that said fuel oil when cold can beignited by the spark type igniter 2823.

The atomization of the oil provided by the jet of air discharging fromthe opening 5| will be beneficial at all times during the operation ofthis oil burner and will increase both the emciency and capacity of theburner.

To install this invention in a fuel oil burner of standard constructionI preferably take a cup complete the device.

The foregoing description and accompanying drawing clearly disclose apreferred embodiment of my invention but it will be understood that thisdisclosure is merely illustrative and that changes in the inventionmaybe made within the scope and spirit of the following claims.

I claim:

1. In an oil burner, a rotating air supply tube; a rotating oil burnercup secured to an end portion of said air supply tube, said cup having acylindrical outer wall and a conical inner wall that expands toward thedischarge end of the cup and said cup terminating in a relatively thindischarge edge over which oil will discharge in a conical film when theburner is in operation; an outer sleeve carried by said cup in spacedrelation from the exterior of the cup to provide a cylindrical airconduit between the sleeve and the cup, said air conduit having anannular discharge passageway of narrow width positioned substantiallyflush with the dischargeend of the cup; a conduit connecting saidannular air discharge passageway with said air supply tube; a secondarycup within the bottom portion of said burner cup and secured to saidburner cup; a nonrotatable oil inlet tube positioned within said airsupply tube and extending into said secondary cup; an inner sleevewithin said secondary cup on said oil inlet tube providing oil and airsealing means between said cup and said oil inlet tube; spring meansyieldingly holding said inner sleeve in sealing engagement with saidsecondary cup; a plug fitting carried by the outer end portion of saidsecondary cup and having oil discharge openings therein; a shank on saidplug fitting; an oil deflector disc movably carried by said shank withits peripheral portion positioned in engage ment with the conical innerwall of said oil burner cup; and resilient means yieldingly urging saiddeflector disc into engagement with said conical inner wall of said oilburner cup.

2. In an oil burner, a rotary burner cup having a thin edge over whichan outwardly spreading cone shaped film of oil will discharge when theburner is operating; means adapted to supply fuel oil to the inside ofsaid cup; high pressure air supply means; low pressure air supply meansindependent of said high pressure air supply means; air conduit meansconnected with said high pressure air supply means and positionedexternal to said burner cup and having an annular air discharge openingof narrow width extending around the discharge end of said cup in closeproximity thereto positioned to direct a thin annular sheet of air intosaid discharging film of oil at substantially the location where saidoil leaves said burner cup,'said annular sheet of air being of apressure high enough to thoroughly atomize cold fuel oil and conditionsaid cold fuel oil for ignition in starting; electric igniter meanspositioned adjacent the point of discharge of said thoroughly atomizedoil; and an air supply conduit connected with said low pressure airsupply means and having outlet openings positioned external to saidnarrow annular high pressure air discharge Opening adapted to supply airat relatively low pressure to said atomized fuel for combustionpurposes.

3. In an oil burner, a rotating burner cup having a conical inner wallterminating at its larger end in an edge over which oil will dischargewhen the burner is in operation; oil pressure supply means connectedwith the inner end portion of said cup; an oil deflector disc carriedwithin said burner cup and movable longitudinally of said cup andyieldingly urged against said conical inner wall and operable to deflectand distribute outflowing oil in an even film along the conical innerwall of said cup; high pressure air supply means; low pressure airsupply means independent of said high pressure air supply means; airconduit means external to said cup and connected with said high pressureair supply-means and having an annular air discharge opening of narrowwidth extending around the discharge end of said cup in close proximitythereto positioned to direct a thin annular sheet of high pressure airinto said discharging film of oil at substantially the location wheresaid oil leaves said burner cup, said annular sheet of air being of apressure high enough to thoroughly atomize cold fuel oil and conditionthe same for easy ignition in starting; electric igniter meanspositioned in the path of the discharging oil; and air supply conduitmeans connected with said low pressure air supply means and positionedto deliver low pressure air to the burning fuel for combustion purposes.

4. In an oil burner, a rotating air supply tube; a rotating oil burnercup secured thereto; said .cup terminating in a relatively thindischarge edge over which oil will discharge in a conical film when theburner is in operation; an outer sleeve surrounding said cup in spacedrelation therefrom providing an air passageway having a narrow annulardischarge opening extending around and substantially flush with the oildischarge edge of the cup; a conduit connecting said air passageway withsaid air supply tube; high pressure air supply means connected with saidair supply tube; a secondary cup within the bottom portion of said oilburner cup and secured thereto; a non-rotatable oil inlet tube extendinginto said secondary cup adapted to supply oil thereto; an inner sleevein said secondary cup on said oil inlet tube providing oil and airsealing means between said secondary cup and said oil inlet tube;-spring means yieldingly holding said inner sleeve in sealing engagementwith said secondary cup; and end means for said secondary cup supportingsaid spring means and having oil discharge openings therein.

JOHN G. FROST.

